h2olog: rename the bpf buffer
h2olog: rename the bpf buffer

devnexen/h2o,yannick/h2o,yannick/h2o,h2o/h2o,h2o/h2o,cwyang/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,devnexen/h2o,cwyang/h2o,yannick/h2o,cwyang/h2o,cwyang/h2o,devnexen/h2o,h2o/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,yannick/h2o,devnexen/h2o,h2o/h2o,yannick/h2o,yannick/h2o,h2o/h2o,devnexen/h2o,cwyang/h2o,h2o/h2o,h2o/h2o,devnexen/h2o,cwyang/h2o,h2o/h2o,cwyang/h2o,h2o/h2o